Bayonet type can closure



July 9, 1935; I v A. DAVIYS, JR 2,007,552

BAYONET'TYPE CAN CL'OSURE Filed June 18, 1932 I: VENZ MA] I A TZRNEY so 1; and

Patented July 9, 1955 UNITED STATES PATENT OFFICE BAYONET TYPE CAN CLOSURE Augustine Davis, Jr., Cincinnati, Ohio Application June 18, 1932, Serial No. 617,931

6 Claims. (Cl. 220-40) This invention relates to can covers and retainward, thereby bu g he ton sto th 1- ing means of the bayonet type, more especially nesting portion. This hollow ribbin s Ca d for'bulk delivery cans suitable for long service outward into the lateral tips, at 2|,with the result and rough usage. that the depending tongues are virtually unbend- 5 An object of this invention is to provide a can able both laterally and vertically. 5

closure with a particularly simple and efiicient WO gr 01 i w d y extending corrugations bayonet type lock which is sturdy, durable, and 3 are f d n t can ee se u acan not be forced open by any pressures to which tiOnS have a pitch d e ve s ads under it may be subjected in service, and which will which the u s 22 engage to lock the over remain reliably and tightly engaged in service. 011 th n after o pressing the gasket S fi 10 Another object of the invention is to provide a Ciently to P e & qu dj tach of bayonet type can closurewhich has no obstructhe r ov r c rr i ns 8 x n app xitions on the outside of the can neck to interfere m ly 90 around the circumference of the can and become damaged in pouring or when the cap neck. The length of these grooves or corrugations 5 is removed, and which ofiers a minimum of bmay be made somewhat greater or less, but the struction on the inside of th neck t ou i g, pitch of the corrugations is so related to. their handling, or cleaning the can. A further object n h t a he n s will no m ve as f r as is to provide such a closu e having ini the ends of the corrugations, even after the gasket number of parts. The preferred embodiment of as become worn. I pr f r to ma the slope r the invention requires only one part in addition Ditch t e co at s 3 comparatively Slight, 20

to the can and cover. a so that very considerable pressure can be exerted In the accompanying drawing, forming a, part between the gasket and the bearing area on top hereof; of the neck with a comparatively small twisting Fig. 1 is a side elevation, artl in s ti pressure on the cover and the lock tends to remain 2:5 showing the upper portion of a can with a cover engaged W t out loosening due 9 J' 0f e 5' and bayonet type lock embodying this invention; 6911- Fig. 2 is an enlarged sectional view through the The inwardly extending eelrllgatiens 23 e cover and can neck shown in Fig. 1, this tion flattened bottom faces for engagement by the being taken at right angles to the section in Fig. n u tips se flattened faces reduce the bending moment of the tongues and increase 30 Fig. 3 is an enlarged sectional view on the line the area of contact between the tongue tips and 3-3 of Fig. 1. I corrugations, thereby reducing the wear. The

The can ID has a neck 12, which has a much radial lines of the flattened faces 30 are substanenlarged top H, formed by rolling the metal outa y horizental- W the tellgues 22 exert a 85 wardly over a wire, to provide a. broad bearing strong pward Pressure against the flattened 4 area for contact with a gasket IS. The cover is is faces 30,,there is little or no resultant force tendformed with a recessed annular elevation 20, and me to bend the ton u has a deep skirt 2| which extends downward The x nsi n f th s rt 2| f the ver around the neck, this skirt being entirely free and downward below the tongues protects the latter separated from the neck. from serious injury when the cover is 011'. 40

Two reversely disposed internal tongues 22 are Terms of orientation in the specification and secured to the under side of the depressed top 23 claims are relative since the position to the can or the cover. These tongues extend downward openin and c v r an n be changed- Other from the top of the cover, and have short enchanges and mo fi y he made in th I gaging tips 24 which terminate substantially at form of the embodiment illustrated without de- 45 or adjacent the inner surface of the neck. These parting from the invention set forth in the aptongues are formed on the ends of a single stamppended claims. ing 25, the transverse connecting portion of which I claim: is applied to the cover top, making an exception- 1. A sheet metal can and cover with bayonet ally strong combined construction of the cover type locking means for holding the cover on the 50 and tongues and one that is very easy to manucan, comprising two tongues connected to the facture. .Thestamping 25 is preferably welded under side of the cover and extending substanto the cover top. The tongue portions of this bar tially vertically downward close to the inside are hollowed downward and crosswise, as shown wall of the can neck, radially extending tips at at 26, by forcing the metal downward and inthe bottom ends of said tongues, and corruga-- tions in the can neck extending inwardly for a greaterdistancethanthethicknessofthecan neck and formed with substantially horizontal flat faces on their lower sides for contact withthe tipstoholdthecoveronthecanbyasubstantlally vertical pull so that the tongues do not bend inward and slip over the corrugations when the cover is clamped on the can with great force.

2. A sheet metal can and cover with bayonet type locking means for holding the cover on the can, including a one-piece metal stamping having a connecting portion extending snubstantial- 1y across the under side of the cover. and welded to said cover, and having substantially vertical tongue portions extending downward from the ends of the connecting portion and terminating at their lower ends in horiaontal, tips, inwardly extending corrugations in the can. each formed with a substantially hormontal fiat face .on its -lower side, said corrugations being sloped to tongues when said tonsues are clamped against the corru ation to hold the cover on the can.

4. An article of manufacture comprising a sheet metal can having a neck formed with diametricala,oo7,ses

ly opposed inwardly extending corrugations in the sheet metalandslightlyinclinedto serveas threadsforradiallyextendingtonguesofacover, said corrugations extending inwardly for a distancegreaterthanthethicknessofthesheet metal of the canandbeingformed with a 11sttenedfaceonthelowersidetoinereasethearea 'ofcontactwiththetonguesofthecoverand thereby reduce the wear caused by friction between said tongues and corrugations.

5. A sheet-metal can and cover with bayonet type locking means for holding the cover on the can, including a thread formed by corrugations in the sheet metal of the can, tongues connected tothecoverandextendingdownwardinthecan substantially normal to the plane of contact of the cover on the .can, and short tips at the lower endofeachtongueeatendingimderthethread in the can, said tips-being of alength not substantially greater than the depth of the thread.

6. A bayonet typefcan closure comprising a pressed metal cover shaped to fit over the top of a can, and a one-piece metal stamping having a connecting portion extending substantially across the under side of the cover and welded to said cover, substantially vertical tongues extending downward from the ends of the connecting portion and terminating at their lower ends in radial tips for clamping under projections on the inside of the can neck to hold the cover on the can, each of the tonguesand the adjacent connecting portion being hollowed downward to form a ribbing which buttresses the tongues to the connecting portion, said ribbing extending outwardintothetipstobraeesaidtipsagainst bending. 1

AUGUSTINE DAVIS, Ja. 

